JP2008175944A - Manufacturing method of display device and lamination substrate base material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and highly accurately form the parting surface of a substrate base material. <P>SOLUTION: A seal member forming step for forming a seal member 15 on the surface of a first substrate base material 31 in a lattice shape so as to include a parting region 50 when viewed from the normal direction of the surface of the first substrate base material 31 and a parting step for parting a lamination substrate base material 34 together with the seal member 15 in the parting region 50, are performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a display device such as a liquid crystal display device, and a bonded substrate base material on which a plurality of the display devices are formed.

  A liquid crystal display device, which is one of the thin display devices, generally has a structure in which two glass substrates are stacked in parallel with a certain minute gap, and a liquid crystal material is filled in the gap. ing.

  A general manufacturing method of a conventional liquid crystal display device (hereinafter also referred to as a liquid crystal display panel) will be described with reference to FIGS. First, a sealing member forming process is performed. That is, as shown in FIG. 11, when a glass substrate 101 constituting a CF (Color Filter) substrate and a glass substrate 102 constituting a TFT (Thin Film Transistor) substrate are bonded together, one of these two substrates is attached. A plurality of seal members 103 are arranged. In the example of FIG. 11, the seal member 103 is bonded and fixed to the surface of the glass substrate 101. The seal member 103 is formed in a substantially frame shape so as to define a region that becomes a space for confining liquid crystal (hereinafter referred to as a liquid crystal cell), but is not a completely closed ring, but is an enlarged plan view. As shown in FIG. 1, one portion is cut off as the inlet 116.

  The glass substrates 101 and 102 are large-sized substrate base materials from which a plurality of liquid crystal display panels can be cut out. That is, the seal member 103 is provided at a predetermined interval for each liquid crystal display panel. For example, a thermosetting resin or the like is generally applied to the seal member 103.

  Next, a substrate bonding process is performed. That is, the glass substrates 101 and 102 are bonded through the seal member 103. The seal member 103 is cured by heating, for example.

  In the subsequent dividing step, the glass substrates 101 and 102 are divided for each individual region including one liquid crystal cell. As a result, as shown in FIG. 12, a plurality of bonded substrates 114 each having a liquid crystal cell 115 are obtained.

  Subsequently, a liquid crystal filling step is performed. In this step, the bonded substrate board 114 is housed in a vacuum device (not shown), and both the inside and the outside of the liquid crystal cell 115 are brought into a vacuum state. In this state, as shown in FIG. 13, the inlet 116 of the seal member 103 is immersed in the liquid crystal material 104, and the inside of the vacuum apparatus is gradually returned to atmospheric pressure. Then, the liquid crystal material 104 enters the liquid crystal cell 115 due to the pressure difference between the inside and the outside of the liquid crystal cell 115 and the capillary phenomenon.

  Thus, after the liquid crystal cell 115 is filled with the liquid crystal material 104, a sealing process is performed. That is, the sealing resin 105 that is, for example, an ultraviolet curable resin is applied to the injection port 116. Subsequently, the sealing resin 105 is cured by irradiating ultraviolet rays to obtain a bonded substrate 114 in which the liquid crystal material 104 is sealed in the liquid crystal cell 115 as shown in FIG.

  After that, although detailed explanation is omitted, each of the cleaning process of the bonded substrate 114, the lighting inspection, the polarizing plate pasting process, the FPC connection process, the backlight and case mounting process, and the final point inspection process are divided. This is performed for each bonded substrate 114 (each liquid crystal display panel). A liquid crystal display panel is manufactured by the above steps.

  As described above, in manufacturing a conventional liquid crystal display panel (particularly, a small-sized liquid crystal display panel applied to a mobile phone or the like), one large glass substrate (substrate base material) is divided into several hundreds. A liquid crystal display panel is manufactured. In that case, in the conventional technology as described above, the polarizing plate sticking step and the inspection step are performed for each of the divided liquid crystal display panels. There is a problem that it ends up.

  In order to solve this problem, it is proposed that a polarizing plate that has been cut in advance is pasted together on a strip-shaped substrate in which regions to be liquid crystal cells are arranged in a row, and then divided into individual liquid crystal cells. (See, for example, Patent Document 1).

In addition, for a glass substrate base material on which large-size polarizing plates are bonded together, the polarizing plate is removed in a band shape along the dividing line around each liquid crystal cell, and then the glass substrate base material is replaced with each liquid crystal It is also known to divide each cell (see, for example, Patent Document 2). That is, a polarizing plate having substantially the same shape as the liquid crystal cell is left for each liquid crystal cell in the glass substrate base material before dividing. In this case, a predetermined interval is provided between the adjacent seal members, and the polarizing plate is removed in a band shape between the seal members.
JP-A-6-342139 JP 2004-4636 A

  By the way, as described above, in the manufacturing method in which the polarizing plate attached to the large-sized substrate base material is removed in a strip shape, the tool can be run on the substrate where a tool for dividing the substrate base material (for example, a scribe wheel) is exposed. As described above, it is necessary to remove the polarizing plate with a predetermined width using a blade. As a result of extensive research by the present inventors, when the thickness of the glass substrate base material is 0.7 mm, there is no problem in the state of the substrate after cutting because the strength of the glass substrate itself is relatively high. However, it has been found that when the thickness of the glass substrate base material is 0.4 mm or less, the glass substrate base material may break without being able to withstand the pressure of the blade.

  In addition, along with the thinning of the substrate base material, when a tool such as a scribe wheel is run along the dividing line of the substrate base material, the substrate base material is greatly bent and the accuracy of the sectional surface is reduced. The problem gets bigger.

  In particular, when a dividing line (also referred to as a scribe line) is formed so as to intersect at 90 degrees, a dividing section is formed in a region that becomes the intersection point when the tool is run so as to be orthogonal to the previously formed scribe line. The accuracy of the remarkably decreases. In addition, the reduction in the accuracy of the cross section becomes more prominent as the thickness of the substrate base material becomes thinner, and as a result of cracks and the like, there is a possibility that the substrate base material itself cannot be divided.

  The present invention has been made in view of such various points, and an object of the present invention is to easily and accurately form a sectional surface of a substrate base material even if the substrate base material is thinned. There is to do.

  In order to achieve the above object, according to the present invention, the sealing member is formed in a lattice shape so as to include the divided region.

  Specifically, the manufacturing method of the display device according to the present invention includes a first substrate base material, a second substrate base material disposed opposite to the first substrate base material, the first substrate base material, and the A laminated substrate base material provided with a plurality of display medium layers disposed between the second substrate base materials and sealed by a sealing member is divided at a divided region around the display medium layer to form a plurality of A method for manufacturing a display device, wherein the sealing member is latticed with respect to a surface of the first substrate base material so as to include the divided region when viewed from a normal direction of the surface of the first substrate base material. A sealing member forming step formed in a shape, and a dividing step of dividing the bonded substrate base material together with the seal member in the dividing region.

  A polarizing plate attaching step of attaching a polarizing plate to at least one of the first substrate base material and the second substrate base material, and a removing step of removing a part of the polarizing plate in a lattice-shaped region including the divided region; In the dividing step, the bonded substrate matrix may be divided in the divided region where the polarizing plate is removed.

  It is preferable to include a display medium supply step of dropping the display medium onto a region on the first substrate base material surrounded by the seal member. Further, the display medium may be a liquid crystal.

  In the dividing step, it is preferable that the bonded substrate matrix is divided by a scribe wheel having a rotary blade.

  The thicknesses of the first substrate base material and the second substrate base material are preferably 0.05 mm or more and 0.7 mm or less.

  In the sealing member forming step, a margin region that is surrounded by the sealing member and that is not filled with the display medium in the substrate bonding step may be formed.

  The bonded substrate base material according to the present invention includes a first substrate base material, a second substrate base material disposed opposite to the first substrate base material, the first substrate base material, and the second substrate base material. A plurality of display medium layers arranged in a matrix between substrate base materials, and a sealing member formed so as to surround the display medium layers between the first substrate base material and the second substrate base material, respectively. A bonded substrate base material on which a plurality of display devices are formed by being divided at a divided region around the display medium layer, wherein the region where the seal member is formed is When viewed from the normal direction of the surface of one substrate base material, the substrate is formed in a lattice shape including the divided region.

  The display medium layer may be a liquid crystal layer.

  The thicknesses of the first substrate base material and the second substrate base material are preferably 0.05 mm or more and 0.7 mm or less.

  A margin region surrounded by the seal member and not provided with the display medium layer may be formed.

-Action-
Next, the operation of the present invention will be described.

  In the case of manufacturing the display device, in the sealing member forming step, the bonded substrate base material when the sealing member is viewed from the normal direction of the surface of the first substrate base material with respect to the surface of the first substrate base material. It is formed in a lattice shape so as to include the divided regions. Then, a parting process is performed and a bonded substrate base material is parted with a sealing member in a parting area. In the dividing step, for example, the bonded substrate matrix can be divided by a scribe wheel provided with a rotary blade.

  That is, since the lattice-shaped region in which the seal member is formed includes a divided region, the bonded substrate base material is divided together with the seal member in the divided region. Therefore, in the dividing region, since the space between the first substrate base material and the second substrate base material is not hollow and a sealing member is provided, the first substrate base material and the second substrate base material are sealed at the time of dividing. It becomes possible to support by the member. Therefore, even if the first substrate base material and the second substrate base material are thinned, bending of the first substrate base material or the second substrate base material is suppressed at the time of division, and the divided cross section of each substrate base material is accurate. Well formed. In addition, even in a region where the divided regions intersect, since it is supported by the seal member, a defective separation is suppressed.

  In addition, when the sealing member is formed in a plurality of independent annular shapes as in the prior art, it is difficult to form the plurality of sealing members, which is troublesome. Since the member is formed in a simple shape such as a lattice shape, the seal member can be easily formed.

  In addition to the sealing member forming step and the dividing step described above, a polarizing plate pasting step and a removing step can also be performed. In this case, in the polarizing plate attaching step, the polarizing plate is attached to at least one of the first substrate base material and the second substrate base material. Subsequently, in the removing step, a part of the polarizing plate is removed in a lattice-shaped region including the divided region. In the dividing step, the bonded substrate matrix is divided in the divided region where the polarizing plate is removed.

  In this way, since the polarizing plates can be pasted together in the state of the substrate base material, the workability is dramatically improved compared to the case where the polarizing plates are pasted to the individual display devices after the division. Rise.

  Furthermore, it is possible to drop the display medium onto the area on the first substrate base material surrounded by the seal member by performing the display medium supply process. In this way, since the display medium is supplied in a batch in the state of the substrate base material, there is no need to form a display medium layer for each display device after division. For example, when liquid crystal is applied to the display medium, a liquid crystal display device is manufactured.

  The thicknesses of the first substrate base material and the second substrate base material are preferably 0.05 mm or more and 0.7 mm or less. Here, when the thickness of the first substrate base material and the second substrate base material is smaller than 0.05 mm, it becomes difficult to maintain the mechanical strength of the first substrate base material and the second substrate base material. It is not preferable. On the other hand, when the thicknesses of the first substrate base material and the second substrate base material are larger than 0.7 mm, it is not preferable in that the progress shift of the dividing plane becomes remarkable.

  In the sealing member forming step, it is also possible to form a region surrounded by the sealing member and not filled with the display medium in the substrate bonding step. In this way, the area that is not filled with the display medium can be made a mounting area in which, for example, an IC driver or the like is mounted after the bonded substrate base material is divided.

  According to the present invention, the first substrate base material and the second substrate base material can be supported by the seal member at the time of division by forming the seal member in a lattice shape so as to include the division region. Even if the base material and the second substrate base material are thinned, the divided cross section of each substrate base material can be formed easily and with high accuracy. Further, the display area can be enlarged by reducing the frame area.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.

Embodiment 1 of the Invention
1 to 6, 8 and 9 show Embodiment 1 of the present invention. First, the configuration of the liquid crystal display device 1 as a display device will be described with reference to FIGS. FIG. 2 is an enlarged cross-sectional view showing a part of the liquid crystal display device 1. FIG. 3 is a side view schematically showing the appearance of the liquid crystal display device 1. In FIG. 2, the thickness of the liquid crystal display device 1 is exaggerated for convenience of explanation. Further, in FIG. 3, the illustration of the gap between the substrates is omitted.

  As shown in FIGS. 2 and 3, the liquid crystal display device 1 includes a TFT substrate 2 on which a plurality of TFTs (Thin-Film Transistors: not shown) as switching elements are formed, and is opposed to the TFT substrate 2. For example, a CF substrate 3 on which a color filter (not shown) or the like is formed, and a liquid crystal layer 4 that is a display medium layer provided between the CF substrate 3 and the TFT substrate 2 are provided.

  The TFT substrate 2 includes a glass substrate 11 as a first substrate and a polarizing plate 13 provided on the opposite side of the glass substrate 11 from the liquid crystal layer 4 side. The polarizing plate 13 is attached to the glass substrate 11 via the adhesive layer 23. On the other hand, the CF substrate 3 has a glass substrate 12 as a second substrate and a polarizing plate 14 provided on the opposite side of the glass substrate 12 from the liquid crystal layer 4 side. The polarizing plate 14 is affixed to the glass substrate 12 via the adhesive layer 24. Thus, the glass substrate 12 overlaps the glass substrate 11 with the liquid crystal layer 4 interposed therebetween.

  Further, as shown in FIG. 3, the TFT substrate 2 is provided with a terminal portion 19 that is a region in which only the glass substrate 11 protrudes without overlapping the glass substrate 11 and the glass substrate 12. The terminal portion 19 is a mounting area for connecting, for example, the FPC 18 and an IC driver.

  The liquid crystal layer 4 includes a liquid crystal material in a liquid crystal cell 20 defined by the glass substrates 11 and 12 and an annular seal member 15 interposed between the glass substrates 11 and 12 in a plan view. It is configured by being enclosed. In other words, the sealing member 15 is disposed so as to continuously surround the entire circumference of the liquid crystal layer 4 between the glass substrates 11 and 12. Here, “surrounding the entire circumference continuously” means surrounding the periphery completely in an annular manner.

  Thus, the liquid crystal display device 1 is supplied with a control signal from the FPC 18 or the like to each TFT, and a predetermined voltage is applied to the liquid crystal layer 4 for each pixel, so that a desired display is performed. Yes.

  Next, the configuration of the bonded substrate base material 34 will be described with reference to FIGS. 1 and 4. FIG. 1 is an enlarged plan view showing a part of the bonded substrate base material 34. FIG. 4 is an exploded perspective view schematically showing the bonded substrate base material 34.

  The above-described liquid crystal display device 1 is manufactured by dividing the bonded substrate base material 34 into a plurality of pieces. That is, the bonded substrate base material 34 is formed so as to form a plurality of liquid crystal display devices 1 by being divided at a divided region 50 around the liquid crystal layer 4 as shown in FIG. In other words, the bonded substrate matrix 34 is an aggregate in which a plurality of bonded substrates 10 that will later become the liquid crystal display device 1 are arranged in a matrix.

  As shown in FIG. 4, the bonded substrate base material 34 includes a first substrate base material 31, a second substrate base material 32 arranged to face the first substrate base material 31, and a first substrate base material 31. And the liquid crystal layer 4 which is a plurality of display medium layers arranged in a matrix between the second substrate base material 32 and the liquid crystal layer 4 between the first substrate base material 31 and the second substrate base material 32, respectively. And a sealing member 15 formed so as to surround it. The liquid crystal layer 4 is formed by dropping a liquid crystal 33 as a display medium in a region where the seal member 15 is formed.

  As shown in FIG. 4, a polarizing plate 14 having the same size as that of the second substrate base material 32 is collectively attached to the surface of the second substrate base material 32 opposite to the liquid crystal layer 4. . On the other hand, although not appearing in FIG. 4, the polarizing plate 13 having the same size as the first substrate base material 31 is stuck together on the surface of the first substrate base material 31 opposite to the liquid crystal layer 4. It has been. That is, polarizing plates 13 and 14 having approximately the same size as the bonded substrate matrix 34 are bonded to both outer side surfaces of the bonded substrate matrix 34.

  The first substrate base material 31 is formed as an aggregate of the TFT substrate 2, for example. On the other hand, the second substrate base material 32 is formed as an aggregate of the CF substrate 3, for example. The present invention is not limited to this, and the aggregate of the TFT substrates 2 can be used as the second substrate base material, while the aggregate of the CF substrates 3 can be applied as the first substrate base material.

  The thickness of the first substrate base material 31 and the second substrate base material 32 is specified to be 0.05 mm or more and 0.7 mm or less. Further, the second substrate base material 32 is formed thinner than the first substrate base material 31. Here, when the thickness of the first substrate base material 31 and the second substrate base material 32 is smaller than 0.05 mm, the mechanical strength of the first substrate base material 31 and the second substrate base material 32 is maintained. Is not preferable because it becomes difficult. On the other hand, when the thickness of the first substrate base material 31 and the second substrate base material 32 is larger than 0.7 mm, it is preferable in that the cross-sectional progress shift becomes remarkable when the bonded substrate base material 34 is divided. Absent. Therefore, as described above, the thicknesses of the first substrate base material 31 and the second substrate base material 32 are desirably 0.05 mm or more and 0.7 mm or less.

  As shown in FIG. 1, the bonded substrate base material 34 has a seal member forming region 47, which is a region where the seal member 15 is formed, viewed from the normal direction of the surface of the first substrate base material 31. In addition, it includes a dividing region 50 and is formed in a lattice shape.

  That is, a scribe groove for dividing is formed on the surface of the bonded substrate base material 34 as described later. In the present specification, this scribe groove is referred to as a dividing line 46. As shown in FIG. 1, the dividing line 46 is formed in a lattice shape at the time of dividing. Further, a region where the cutting line 46 is formed on the bonded substrate base material 34 is referred to as a cutting region 50. Therefore, the dividing region 50 is formed in the same lattice shape as the dividing line 46.

  In the first embodiment, the seal member forming region 47 includes the above-described divided region 50 and is formed along the divided region 50 with a predetermined width larger than that of the divided region 50. The dividing region 50 is disposed at the center in the width direction of the seal member forming region 47. Therefore, when viewed from the normal direction of the surface of the bonded substrate base material 34, the divided region 50 overlaps the seal member forming region 47.

  Moreover, the dividing line 46 divides and forms the external shape of each bonded substrate 10, as shown in FIG. That is, the bonded substrate base material 34 is a region surrounded by the seal member 15 and provided with the liquid crystal layer 4 and a terminal surrounded by the seal member 15 and not provided with the liquid crystal layer 4. A portion 19 is formed. The terminal portion 19 is formed by parting and removing a part of the second substrate base material 32 along the parting line 46, as will be described later.

-Manufacturing method-
Next, a method for manufacturing the liquid crystal display device 1 will be described. The manufacturing method of Embodiment 1 includes a seal member forming step, a display medium supplying step, a substrate laminating step, a polarizing plate pasting step, a removing step, and a dividing step, as will be described below. It is.

  Thus, the first substrate base material 31, the second substrate base material 32 disposed opposite to the first substrate base material 31, and the first substrate base material 31 and the second substrate base material 32 are disposed. In addition, a plurality of liquid crystal display devices 1 are manufactured by dividing a laminated substrate base material 34 including a plurality of liquid crystal layers 4 sealed with a sealing member 15 at a dividing region 50 around the liquid crystal layer 4. To do.

  That is, first, a first substrate base material 31 is manufactured by patterning a plurality of TFTs, pixel electrodes, and the like on a glass substrate base material. On the other hand, the second substrate base material 32 is manufactured by patterning CF, common electrodes and the like on the glass substrate base material.

(Seal member forming process)
Next, in the sealing member forming step, the sealing member 15 is formed in a lattice shape so as to include the dividing region 50 when viewed from the normal direction of the surface of the first substrate base material 31 with respect to the surface of the first substrate base material 31. To form. Then, in the substrate bonding step to be performed later, the region of the liquid crystal cell 20 that is surrounded by the seal member 15 and filled with the liquid crystal 33, and the terminal portion 19 that is the region surrounded by the seal member 15 and not filled with the liquid crystal 33. Respectively.

  In the first embodiment, the assembly of the TFT substrates 2 is described as the first substrate base material 31. However, as described above, in the present invention, the assembly of the CF substrates 3 is also used as the first substrate base material 31. Can be applied. That is, the sealing member 15 may be supplied to the second substrate base material 32 in the first embodiment.

  When the sealing member 15 is formed in a lattice shape on the surface of the first substrate base material 31, the sealing member 15 may be applied by, for example, a small syringe (syringe) that is a dispenser or formed by screen printing. Also good.

  Here, as shown in FIG. 1, the dividing region 50 of the bonded substrate base material 34 is formed in a lattice shape so as to form the outer shapes of the TFT substrate 2 and the CF substrate 3 arranged adjacent to each other. The seal member 15 is formed in a lattice shape by being formed so as to overlap with the divided region 50. In addition, it is desirable that the dividing region 50 pass through the center in the width direction of the region where the seal member 15 is formed. Then, as shown in FIG. 1, the sealing member 15 is formed so as to surround the region where the liquid crystal cell 20 is formed and the region where the terminal portion 19 is formed in a rectangular shape.

  The present invention is particularly effective when a large glass substrate base material is divided to produce a large number of medium-sized or small-sized liquid crystal display devices. However, in mobile phones and car navigation systems that are the main applications of these medium-sized and small-sized liquid crystal display devices, unlike the OA equipment that is the main application of large-sized liquid crystal display devices, the required heat-resistant temperature is high. The seal member 15 is preferably a photocurable resin having heat resistance. Moreover, it is also preferable to apply a thermosetting resin or a type of resin that is cured by a combination of light and heat as the seal member 15.

(Display medium supply process)
Next, a display medium supply process is performed. In the display medium supply step, a liquid crystal material that is a display medium is supplied to an area inside each seal member 15. For example, as shown in FIG. 4, the liquid crystal material 33 is dropped on a region on the first substrate base material 31 surrounded by the seal members 15. The liquid crystal material 33 is dropped by an amount corresponding to the volume of the liquid crystal cell 20 and accumulates inside the seal member 15.

  In this step, the liquid crystal material may be supplied dropwise to a predetermined region of the second substrate base material 32 corresponding to the region inside the seal member 15 in the first substrate base material 31.

(Board bonding process)
In the next substrate bonding step, the first substrate base material 31 and the second substrate base material 32 are bonded together to form a bonded substrate base material 34. First, the second substrate base material 32 is stacked on the first substrate base material 31 from above under a vacuum state. In this state, the sealing member 15 is cured by irradiating light such as ultraviolet rays and heating as necessary. As a result, the liquid crystal material 33 is sealed inside the liquid crystal cell 20.

(Polarizing plate attaching process)
Next, a polarizing plate sticking process is performed. In the polarizing plate pasting step, the large polarizing plates 13 and 14 are pasted on at least one of the first substrate base material 31 and the second substrate base material 32. In the first embodiment, the polarizing plates 13 and 14 are attached to the first substrate base material 31 and the second substrate base material 32 via the adhesive layers 23 and 24, respectively. The polarizing plates 13 and 14 are attached by, for example, sequentially drawing out a roll-shaped polarizing film and supplying it to the bonded substrate base material 34.

(Removal process)
Next, in the removing step, a part of the polarizing plates 13 and 14 is removed from the surface of the bonded substrate base material 34 in a lattice-like region including the dividing region 50. The polarizing plates 13 and 14 are removed by a blade 44 as shown in FIG. 8 which is an enlarged perspective view. The blade 44 is formed in a concave shape when viewed from the front side of the blade edge.

  The polarizing plates 13 and 14 are cut by the blade 44 together with the adhesive layers 23 and 24 on the bonded substrate base material 34, lifted, and removed. Then, as a result of the polarizing plates 13 and 14 and the adhesive layers 23 and 24 being cut with a predetermined width by the blade 44, as shown in FIG. 9 which is an enlarged perspective view of the first substrate base material 31, bonding is performed. On the surface of the substrate base material 34, a removal region 45 in which the polarizing plates 13 and 14 are removed and the surfaces of the glass substrates 11 and 12 are exposed is formed.

  The removal region 45 is formed in a lattice shape including the dividing region 50 when viewed from the normal direction of the surface of the bonded substrate base material 34. Accordingly, the blade 44 passes over the seal member 15 via the first substrate base material 31 or the second substrate base material 32 as shown in FIG. 5 which is a side sectional view.

  In addition, the peeling means for peeling the polarizing plates 13 and 14 and the adhesive layers 23 and 24 is not limited to the blade shape as shown in FIG. 8, and the polarizing plates 13 and 14 from the bonded substrate base material 34. What is necessary is just to have a spatula shape that can be peeled off.

(Partition process)
Next, a dividing step is performed. In the dividing step, the laminated substrate base material 34 is divided together with the sealing member 15 in the dividing region 50 exposed in the removal region 45 after the polarizing plates 13 and 14 are removed.
That is, the laminated substrate base material 34 is divided for each liquid crystal cell 20 in a state where the polarizing plates 13 and 14 divided by the blade 44 are attached. Thus, the bonded substrate matrix 34 is divided into a plurality of display device shapes.

  As shown in FIG. 6 which is a side sectional view, the bonded substrate matrix 34 is divided by a scribe wheel 51 having a rotary blade. That is, the cutting line 46 is formed on the surface of the first substrate base material 31 or the second substrate base material 32 of the bonded substrate base material 34 by rolling the scribe wheel 51 along the cutting region 50. Since the dividing region 50 overlaps the region where the seal member 15 is formed, the scribe wheel 51 is connected to the seal member 15 via the first substrate base material 31 or the second substrate base material 32 as shown in FIG. Pass over. In this way, the dividing line 46 is formed in a lattice shape on the surface of the first substrate base material 31 or the second substrate base material 32 so as to overlap the seal member 15.

  Thereafter, a pressure is applied to the bonded substrate base material 34 to grow a crack from the dividing line 46. Thus, the bonded substrate matrix 34 is divided into a plurality of liquid crystal display device shapes along the dividing line 46.

  At this time, if the cutting tool 44 and the scribe wheel 51 are incorporated in one unit, the unit is caused to travel on the first substrate base material 31 or the second substrate base material 32, so that the removal step and the dividing step are performed. Can be performed simultaneously.

  The tool for dividing the first substrate base material 31 and the second substrate base material 32 is not particularly limited. In the example shown in FIG. 4, an example in which eight liquid crystal display devices are divided from the bonded substrate base material 34 has been described for the sake of explanation. However, the number is not limited to eight and can be set as appropriate. For example, it may be divided into several hundred sheets.

  Thereafter, a lighting inspection step, an FPC connection step, a backlight and case attachment step, and a final point inspection step are performed for each divided liquid crystal display device 1. The liquid crystal display device 1 is manufactured through the above steps.

-Effect of Embodiment 1-
Therefore, according to the first embodiment, the first substrate base material 31 and the second substrate base material 32 are formed at the time of division by forming the sealing member 15 in a lattice shape so as to include the division region 50 of the bonded substrate base material 34. Can be supported by the seal member 15, so that even if the first substrate base material 31 and the second substrate base material 32 are thinned, the divided cross sections of the substrate base materials 31, 32 can be easily and accurately formed. can do. Furthermore, the frame area, which is an area that does not contribute to display in the liquid crystal display device 1, can be reduced and the display area can be enlarged.

  That is, in the conventional case, as shown in FIG. 10 which is an enlarged plan view, a plurality of substantially rectangular frame-shaped seal members 201 are arranged in a matrix at a predetermined interval on the bonded substrate base material 200. That is, each seal member 201 independently forms a frame shape. Thus, in the region where the seal member 201 between the adjacent seal members 201 is not formed, the divided region 202 of the bonded substrate base material 200 is formed in a lattice shape.

  Therefore, in this conventional case, only the glass substrate base material is cut by a tool such as a scribe cutter, for example, in the cutting step of the bonded substrate base material 200. At that time, as shown in FIG. 7 which is a cross-sectional view shown for reference, the glass substrate base material 203 or 204 constituting the bonded substrate base material 200 is formed with the seal member 201 when the tool 205 passes through. It will be distorted in the area which is not. As a result, there is a problem that the accuracy of the sectional surface forming the side surface of the liquid crystal display device is lowered.

  On the other hand, according to the first embodiment, since the sealing member is formed so as to overlap the dividing region 50, as shown in FIG. 6, when the tool such as the scribe wheel 51 passes, the first substrate base material 31 and the second substrate base material 32 can be supported by the seal member 15 from the back side. As a result, since the distortion of the first substrate base material 31 and the second substrate base material 32 accompanying the passage of the tool can be prevented, the side partial cross section of the liquid crystal display device 1 can be formed with high accuracy.

  Further, in the region where the divided regions 50 intersect, the accuracy of the divided section is particularly likely to be significantly lowered. However, in the first embodiment, the sealing member 15 is formed in a lattice shape so as to overlap the divided region 50. Since the first substrate base material 31 and the second substrate base material 32 can be reliably supported by the sealing member 15 even in the region where 50 intersects, the dividing line 46 can be formed with high accuracy without causing cracks. It becomes possible. As a result, even in the four corner portions of the liquid crystal display device 1, the cross section can be formed with high accuracy.

  Such a problem of lowering the processing accuracy of the sectional surface by the conventional method becomes more prominent as the liquid crystal display device becomes thinner, but according to the first embodiment, for example, the first substrate base 31 and the second substrate base. Even if the material 32 is thinned, the sealing member 15 is interposed therebetween, so that the processing accuracy of the sectional surface can be improved regardless of the thinning.

  Furthermore, since the seal member 15 is formed in a lattice shape, the seal member 15 can be easily formed as compared with the case where the seal member 15 is formed in a separate and independent frame shape as in the prior art. In addition, since the polarizing plates 13 and 14 are pasted together on the first substrate base material 31 and the second substrate base material 32, there is no need to individually paste each of the divided liquid crystal display devices. Workability can be dramatically improved.

  In addition, since the thickness of the first substrate base material 31 and the second substrate base material 32 is specified to be 0.05 mm or more and 0.7 mm or less, the mechanical strength of the first substrate base material 31 and the second substrate base material 32 is determined. Can be maintained, and the progress deviation of the dividing surface in the dividing step can be suppressed.

<< Other Embodiments >>
In the first embodiment, the liquid crystal display device 1 in which the display medium layer is a liquid crystal layer has been described as an example. However, the present invention is not limited to this, and the organic EL display device in which the display medium layer is a light emitting layer, etc. The present invention can be similarly applied to this display device.

  As described above, the present invention is useful for, for example, a manufacturing method of a display device such as a liquid crystal display device and a bonded substrate base material, and in particular, a sectional surface of a substrate base material on which a plurality of display devices are formed. Suitable for forming easily and with high precision.

FIG. 1 is an enlarged plan view illustrating a part of a bonded substrate base material according to the first embodiment. FIG. 2 is an enlarged cross-sectional view showing a part of the liquid crystal display device. FIG. 3 is a side view schematically showing the appearance of the liquid crystal display device. FIG. 4 is an exploded perspective view schematically showing a bonded substrate base material. FIG. 5 is a side cross-sectional view showing the blade passing over the bonded substrate base material. FIG. 6 is a side sectional view showing a scribe wheel that passes over the bonded substrate matrix. FIG. 7 is a side sectional view showing a scribe wheel passing over a conventional bonded substrate matrix. FIG. 8 is a perspective view showing the polarizing plate peeled off by the blade. FIG. 9 is an enlarged perspective view showing a part of the first substrate base material. FIG. 10 is an enlarged plan view showing a part of a conventional laminated substrate base material. FIG. 11 is a perspective view showing a conventional glass substrate base material bonded to each other. FIG. 12 is a plan view showing a conventional bonded substrate. It is explanatory drawing which shows the bonding board | substrate in the conventional liquid crystal filling process. It is a top view which shows the bonding board | substrate with which the conventional liquid crystal material was filled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 TFT substrate 3 CF substrate 4 Liquid crystal layer 10 Bonded substrate 11, 12 Glass substrate 13, 14 Polarizing plate 15 Sealing member 19 Terminal part 20 Liquid crystal cell 23, 24 Adhesive layer 31 1st board | substrate base material 32 2nd Substrate base material 33 Liquid crystal material 34 Bonded substrate base material 44 Cutting tool 45 Removal region 46 Cutting line 47 Seal member forming region 50 Cutting region 51 Scribe wheel

Claims (11)

A first substrate base material; a second substrate base material disposed opposite the first substrate base material; and a seal member disposed between the first substrate base material and the second substrate base material. A method for producing a plurality of display devices by dividing a bonded substrate base material provided with a plurality of sealed display medium layers at a dividing region around the display medium layer,
A sealing member forming step of forming the sealing member in a lattice shape so as to include the divided region when viewed from the normal direction of the surface of the first substrate base material with respect to the surface of the first substrate base material;
And a dividing step of dividing the bonded substrate base material together with the sealing member in the dividing region. In claim 1,
A polarizing plate attaching step of attaching a polarizing plate to at least one of the first substrate base material and the second substrate base material;
A removal step of removing a part of the polarizing plate in a lattice-shaped region including the divided region,
In the dividing step, the bonded substrate base material is divided in the divided region where the polarizing plate is removed. In claim 1,
A method of manufacturing a display device, comprising: a display medium supply step of dropping the display medium onto an area on the first substrate base material surrounded by the seal member. In claim 1,
A display device manufacturing method, wherein the display medium is a liquid crystal. In claim 1,
In the dividing step, the bonded substrate base material is divided by a scribe wheel provided with a rotary blade. In claim 1,
The thickness of the said 1st board | substrate base material and the said 2nd board | substrate base material is 0.05 mm or more and 0.7 mm or less, The manufacturing method of the display apparatus characterized by the above-mentioned. In claim 1,
In the sealing member forming step, a region that is surrounded by the sealing member and that is not filled with the display medium in the substrate laminating step is formed. A first substrate base material;
A second substrate base disposed opposite to the first substrate base;
A plurality of display medium layers arranged in a matrix between the first substrate base material and the second substrate base material;
A seal member formed so as to surround each of the display medium layers between the first substrate base material and the second substrate base material;
A bonded substrate base material on which a plurality of display devices are formed by being divided at a divided region around the display medium layer,
The region where the seal member is formed includes the divided region and is formed in a lattice shape when viewed from the normal direction of the surface of the first substrate base material. . In claim 8,
The bonded substrate base material, wherein the display medium layer is a liquid crystal layer. In claim 8,
The thickness of the said 1st board | substrate base material and the said 2nd board | substrate base material is 0.05 mm or more and 0.7 mm or less, The bonded substrate base material characterized by the above-mentioned. In claim 8,
A bonded substrate base material characterized in that a region surrounded by the seal member and not provided with the display medium layer is formed.

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